Finding the Fourth Proportional to 92,928.38, 139,376.12 and 42,315.80

Step by Step Solution

1. Step 1: Write the proportion equation
   92,928.38 : 139,376.12 = 42,315.80 : x
2. Step 2: Convert to fraction form
   92,928.38/139,376.12 = 42,315.80/x
3. Step 3: Cross multiply
   92,928.38x = 139,376.12 × 42,315.80
4. Step 4: Simplify right side
   92,928.38x = 5,897,812,018.70
5. Step 5: Solve for x
   x = 5,897,812,018.70/92,928.38
6. Step 6: Final answer
   x = 63,466.21